Amalgam-mixing device



March l1 1924.

J. S. ROSENBLATT AMALGAM MIXING DEVICE Filed Jan. 25, 1922 Fatented lidar. ll'i,

JAMES S. ROSENBLATT, F CHICAGG, ILLINOIS.

A'iJALGAIfi-WIXXING DEVICE.

application led January 25, 1922.

To @ZZ whom :it may concern:

Be it .known that l, .latins S. RosnNBLA'rr, a citizen of the United States, residing at Chicago, in the county of Cook and State of illinois, have invented certain new and useful improvements in Amalgam-llixing Devices, of which the following is a specification.

My invention relates to an amalgam mixing device and has particular vreference to a device which is adapted to be coupled to the ordinary dental engine in use in dental offices for grinding7 drilling7 and the like, and has a container within which the mixture, usually dental alloy and mercury, is

placed, and the container thereupon is reciprocated rapidly so that the mixture is broken up and thoroughly mixed.

Another and further object of my improved invention is the provision of an amalgam mixing machine having a cylindrical container with an inwardly projecting conical shaped cap at one end thereof -which is adapted to break up the mass of material by a piercing and spreading action of the cone point and to work and knead the mercury used in amalgam mixtures into intimate contact with the other material such. as silver, dental alloy, and the like, usually placed in powder form in the container so thatI the whole mass is thoroughly kneaded and mixed into a paste which is thereupon easily inserted into a tooth cavity.

Heretofore, with the machines in use, it has not been possible to secure thorough mixing of the material because the mercury is absorbed by the Outer portion of the mass so that the mass of material is somewhat wet and sticky on the outside with a dry center. ln other words, the mercury is not mixed uniformly throughout the alloy, but is worked into the outer portion of the mass, but with my improved device, the inwardly projecting conically shaped portion of the cap will, by reason of the mixture being thrown against it, rapidly work or knead the liquid thoroughly into the mass and the opposite side of the cylinder being flat will serve to hold the mixture together so that a uniform mixture is procured.

These and further objects of my invention will be more fully and better understood by reference to the accompanying sheet of drawings in which- Figure l is a side elevational view of my improved device,

Serial No. 531,59.

Figure 2 is a front view of the device shown in Figure 1;

Figure 3 is a view of the opposite side from that shown in Figure 2;

Figure 4L is an enlarged vertical view, partly in section and partly in elevation, of the device shown in Figure 1;

Figure 5 is a detailed sectional view on lines 5-5 of Figure 4.

Referring now specifically to the drawings and in which like reference characters refer to like parts throughout, a frame is shown having a main portion 11 and a side portion 12 which serves as a bracket or guide by means of which the device is clamped upon a table or held in the operators hand during the mixing operation, the arm 12 being integral with the portion 11 and extending outwardly therefrom as shown particularly in Figure et. At one end of the member 11,v and in sliding engagement therewith is a reciprocating member 13 having a portion 14 secured thereto, the portion 141- being turned so that members 15 and 16 are formed thereon which extend around .the member 11 and form a slide or guide for the member 18. Secured to member 13, is a cylindrical container 17, havinga stationary cap 1S removably secured thereto, the cap 18 at its inner portion having a conical shaped inwardly projecting portion 19 of the full diameter of the cavity of the container at its base which is adapted to break up and thoroughly knead the material placed in said container. This cap 18 provides a closure head which is removable without disassembling the reciprocating means. At the opposite end of the member 11 is mounted a transversely extending shaft 2O which has a bushing 21 mounted thereon by means of a pin 22, the said shaft 2O having a free end 23 to which the shaft 2i of a dental engine is adapted to be connected. Upon the opposite end of shaft 2O is mounted a wheel 25 which has a crank arm 26 secured thereto by means of a pin 2T, the crank arm being secured at its opposite end to the member 13 by meansof a pin 28. A guard member 29 extends around the wheel 25 and is secured to the frame 11 by means of a screw 30 so that there is no danger of the operators clothing being caught upon the wheel 25 as it is r0- tated. The arm 12 has an outwardly projecting portion 31 with a circular portion 32 formed thereon which extends around the end 23 of the shaft 2O so the shaft 24C is inserted in the member 32 and a secure connection is formed between the flexible shaft 211 and the shaft 20.

lln the operation of the device, the cap 18 is removed from the cylinder 17 and the mixture placed in the cylinder 17, the cap 18 is thereupon replaced and screwed into the open end or' the cylinder 17 and the free end 23 or the shaft 20 is thereupon connected to the dental engine. As the povver is turned on, the cylinder 17 is rapidly reciprocated throwing the material :from end to end of the cylinder so that the cone-shaped end of the cap 18 breaks up and assists in Working the liquid and the alloy thoroughly and uniformly together into a mass. As the mass is Worked together, it is also wedged between the sloping surface 19 and the outer Walls or the cylinder so that it is squeezed into a compact mass and the material thoroughly Worked together. When the mixing has been thoroughly accomplished, the cap 18 is removed and the mixture, which has been Worked into a pellet, is removed for insertion into a cavity, theJ material being in a soft pasty condition so that it is easily pressed into a cavity and yet is thoroughly mixed.

TWhile l have described more or less precisely the details of construction, l do not Wish to be understood as limiting myself thereto, as l contemplate changes in form and the proportion of parts and the sulstitution of equivalents as circumstances may suggest or render expedient Without departing from the spirit or scope of my invention.

l claim:

1. 1n an amalgam mixing device, the coinbination of a cylindrical container mounted iaeaaee for reciprocation in a direction along its length, a stationary closure head for an end or the container formed With a conical portion extending centrally into the cavity of the container and adapted to pierce and spread the material, and means ior imparting reciprocation to the container; said closure head being removable Without disassembling the reciprocating means.

2. ln an amalgam mixing device, the combination of a cylindrical container mounted for rectilinear reciprocation in a direction along its length, a stationary closure head for an end of the container formed with a conical portion extending centrally into the cavity of the container and o'l' the full diameter of the said cavity at its base, and adapted to pierce and spread the material, and means for imparting reciprocation to the container; said closure head beine removabile Without disassembling the reciprocating means.

3. ln an amalgam mixing device, the combination of a cylindrical container mounted for reciprocation in a direction along its length, a stationary closure head for an end of the container formed with a conical portion extending centrally into the cavity of the container, said conical portion having a base of substantially the same diameter as that oi the cavity or the container, and adapted to pierce and spread the material and means for imparting reciprocation to the container; said closure head being removable Without disassembling the reciprocating means.

Signed at Chicago, Illinois, this 19th day of January, 1922.

JAMES S. RSENBLATT. 

